ANN MATHER - 01 Sep 2021 Form 4 Insider Report for Arista Networks, Inc. (ANET)

Role: Director
Signature: By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Ann Mather
Issuer symbol: ANET
Transactions as of: 01 Sep 2021
Net transactions value: -$141,309
Form type: 4
Filing time: 03 Sep 2021, 20:43:39 UTC
Previous filing: 24 Aug 2021
Next filing: 02 Sep 2021
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ANET	Common Stock	Options Exercise	$12,789	+417	+71%	$30.67	1,003	01 Sep 2021	Direct	F1
transaction	ANET	Common Stock	Sale	$154,098	-417	-42%	$369.54	586	01 Sep 2021	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ANET	Non-Qualified Stock Option (right to buy)	Options Exercise	$0	-417	-25%	$0.000000	1,250	01 Sep 2021	Common Stock	417	$30.67	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The exercises and/or sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 14, 2020.
F2	1/4th of the shares subject to the option vested and became exercisable on December 1, 2018 and 1/48th of the shares subject to the option shall vest monthly thereafter. On September 13, 2019, the reporting person transferred options to purchase 21,156 shares of Arista common stock to her ex-husband pursuant to a domestic relations order. The reporting person disclaims beneficial ownership in all such transferred stock option interests and no longer reports them as beneficially owned.

Content

The exercises and/or sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 14, 2020.

1/4th of the shares subject to the option vested and became exercisable on December 1, 2018 and 1/48th of the shares subject to the option shall vest monthly thereafter. On September 13, 2019, the reporting person transferred options to purchase 21,156 shares of Arista common stock to her ex-husband pursuant to a domestic relations order. The reporting person disclaims beneficial ownership in all such transferred stock option interests and no longer reports them as beneficially owned.